Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
  • B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
  • B01J31/12—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
  • B01J31/14—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides of aluminium or boron
  • B01J31/143—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides of aluminium or boron of aluminium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
  • B01J27/06—Halogens; Compounds thereof
  • B01J27/138—Halogens; Compounds thereof with alkaline earth metals, magnesium, beryllium, zinc, cadmium or mercury
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
  • B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
  • B01J31/04—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing carboxylic acids or their salts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
  • B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
  • B01J31/40—Regeneration or reactivation
  • B01J31/4015—Regeneration or reactivation of catalysts containing metals
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
  • C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
  • C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P20/00—Technologies relating to chemical industry
  • Y02P20/50—Improvements relating to the production of bulk chemicals
  • Y02P20/584—Recycling of catalysts

Definitions

• the subject of the present invention is a solid supported catalyst capable of exhibiting a high catalytic activity, usable for the polymerization of conjugated dienes, its manufacturing process and its application to the preparation of polymers and copolymers of conjugated dienes.
• the subject of the present invention is a solid supported catalyst, stable over time, capable of having a high activity and of giving polymers and copolymers of conjugated dienes of desired microstructure without requiring delicate and / or complicated procedures to be used. works like those needed with some of the catalytic systems mentioned above. In particular, it does not require prepolymerization or pretreatment.
• the solid support used in the present invention is a support from which the reticular planes can deviate under the action of a swelling agent.
• the solid support used is a magnesium dihalide and, preferably, magnesium dichloride.
• the magnesium dichloride is preferably anhydrous but may contain a very small proportion of moisture.
• the swelling agent used in the present invention must be capable of spreading the reticular planes of the support and must be able to be removed after reaction with the support.
• suitable ethers and preferably tetrahydrofuran are suitable ethers and preferably tetrahydrofuran.
• the metal compound or compounds immobilized by the support which is used in the present invention is any compound of a metal chosen from metals having an atomic number between 57 and 71 or 92 of the periodic table of Mendeleev elements in the form isolated or as a mixture of several metals with different atomic numbers.
• metallic compounds are suitable for the trivalent salts of cerium, lanthanum, praseodymium, neodymium, the commercial mixture "didymium", the tetravalent uranium salts and most particularly neodymium trichloride or a trivalent or tetravalent salt of a carboxylic acid having from 2 to 12 carbon atoms or a mixed salt of a carboxylic acid having from 2 to 12 carbon atoms dissolved in the presence of two carboxylic acids of different molecular weights one having from 2 to 12 carbon atoms and the other having from 2 to 5 carbon atoms in a solvent which is preferably toluene.
• carboxylic acids capable of forming a metal salt mention may be made of acetic, butyric, n-hexanoic, n-heptanoic, n-octanoic, 2-hexanoic, versatic ethyl acids.
• Metal can be present in varying amounts in salt metallic while imparting catalytic activity.
• the metal can be present in the metal salt in a range of 1% to 20% by weight relative to the weight of the non-swollen support. Preferably, it is present in an amount of 10% by weight relative to the weight of the non-swollen support.
• the metal compound When the metal compound is present in the form of a carboxylate, it is necessary to use a halogenating agent to obtain a polymer or a copolymer of conjugated dienes having a cis-chain of the monomer units.
• the catalyst comprises, in addition to the reaction product, an organic aluminum compound represented by the form X m Al R ' 3 -m in which the different terms have the meaning mentioned above while the presence of this compound is optional in the case where a compound containing aluminum and corresponding to the formula X n Al R 3-n is used as halogenating agent.
• organic aluminum compound represented by the form X m Al R ' 3 -m in which the different terms have the meaning mentioned above while the presence of this compound is optional in the case where a compound containing aluminum and corresponding to the formula X n Al R 3-n is used as halogenating agent.
• diethyl aluminum hydride diisobutyl aluminum hydride, triethyle aluminum, triisobutyl aluminum.
• This first variant is applicable regardless of the nature of the salt in which the metal compound is present, whether it is a halide or a salt of a carboxylic acid and whether the latter is itself in the form a simple salt or in the form of a mixed salt.
• the agent for extracting and / or complexing the residual blowing agent and the halogenating agent are a single compound corresponding to the formula X n Al R 3-n in which all the terms have the meaning already given previously.
• the halogenating agent is a compound corresponding to the formula X n Al R 3-n
• an organic aluminum compound represented by the form X m Al R ' 3-m in which the different terms have the meaning mentioned previously can be included in the catalyst while its presence is essential as a constituent of the catalyst when the halogenation compound does not correspond to the formula X n Al R 3-n .
• the catalyst according to the present invention allows the polymerization of conjugated dienes and the copolymerization of conjugated dienes together to lead to stereospecific homopolymers and copolymers in cis. Mention may be made, as polymerizable diene monomers, of butadiene -1.3, isoprene, 2,3-dimethyl butadiene, pentadiene-1,3, methyl-2-pentadiene-1,3 .
• the polymerization carried out with the catalyst according to the invention is carried out as known per se. Preferably, it is carried out in the presence of an alicyclic, aliphatic or aromatic hydrocarbon solvent conventionally used for the solution polymerization of conjugated dienes.
• aliphatic solvents are suitable and particularly heptane and cyclohexane.
• the polymerization or copolymerization reaction is carried out at a temperature between 40 ° C and 120 ° C, preferably at a temperature in the region of 60 ° C.
• the polymers and copolymers obtained according to this process according to the invention can be grafted, functionalized or jumped as known per se and can be used as a main component of a mixture which can be used for the manufacture of rubber articles and in particular of tire casings. .
• This example constitutes an embodiment of the catalyst according to the invention, according to the first variant of preparation, namely by coprecipitation.
• THF tetrahydrofuran
• MgCl2 anhydrous magnesium chloride
• NdCl3 neodymium trichloride
• the solid which has taken on a blue color is washed after recovery by simple decantation with 50 ml of heptane and then dried under vacuum at room temperature.
• a suspension consisting of 300 ml of heptane, 1.8 ml of a molar solution of aluminum triisobutyl and 45 mg of the catalyst obtained above is introduced into a reactor, then 11.5 g is dissolved in this suspension of butadiene and the temperature is brought to 60 ° C. for 40 minutes after which the polymerization is stopped by the addition of a polymerization stopper as known per se (methanol / acetone mixture) and 0.7 g of polybutadiene having the following microstructure: cis-1,4 bond content 98.2% bond content 1,2 0.7% content of trans-1,4 bonds 1.1% and an inherent viscosity of 4.5 dl / g
• the catalyst is produced by repeating the procedure of Example 1 with the exception of neodymium trichloride which is replaced by 2.8 ml of a 0.74 molar solution of neodymium tricaproate in tetrahydrofuran.
• Neodymium tricaproate is prepared by reacting a slightly acidic aqueous solution of Nd Cl3 with an aqueous solution of sodium caproate at stoichiometry; the product obtained is dried under vacuum at 50 ° C and then dissolved in tetrahydrofuran.
• Example 2 The procedure of Example 1 is repeated except that neodymium tricaproate is used and the polymerization time is 90 minutes.
• the catalyst used contains 0.4% by weight of neodymium.
• 0.2 g of polybutadiene is obtained having a content of cis-1,4 bonds of 98.1% and an inherent viscosity of 4.2 dl / g.
• the catalyst is produced by repeating the procedure of Example 1 with the exception of neodymium trichloride which is replaced by 5.95 ml of a 0.35 molar sorting solution (ethyl-2-hexanoate) of neodymium in toluene.
• Example 1 The procedure of Example 1 is repeated except that 13.2 mg of the previously prepared catalyst which contains 4.8% by weight of neodymium is used and that the polymerization is stopped after 60 minutes.
• Example 1 The procedure of Example 1 is repeated except that 20.7 mg of the catalyst obtained above is used and that the polymerization is carried out at 60 ° C for 20 minutes. 6.8 g of polybutadiene having a content of cis-1,4 bonds of 98% and an inherent viscosity of 4.1 dl / g are isolated.
• control example is to illustrate the importance of the presence of a swelling agent capable of removing the reticular planes from the support.
• the whole is agitated with a Dangouman type agitator with vertical oscillation having a stroke of 6 cm and operating with a frequency of 7 Hertz or with an acceleration close to 60 m / s2 for 4 hours.
• Example 4 To the support obtained is added 10 ml of the mixed neodymium salt, the preparation of which was described in Example 4 under B. A solid is obtained which is recovered and then dried under vacuum at room temperature. This dried solid is then co-ground for 4 hours after which it is reacted with 20 ml of aluminum diethyl chloride according to the procedure described in Example 4 for step D. The solid reaction system is recovered.
• Example 1 The procedure of Example 1 is repeated except that 55 mg of the reaction system obtained previously is used and that polymerization takes place for 1 hour before stopping the polymerization. At the end of this period, only a few traces of polybutadiene are obtained.
• the preparation is carried out by repeating the procedure used for test A with the exception of the neodymium salt which is replaced by 2 g of anhydrous NdCl3.
• Example 1 The procedure of Example 1 is repeated except that 322.2 mg of reaction system obtained previously with NdCl3 is used and that is polymerized for 1 hour before stopping the polymerization. At the end of this period, 1.5 g of a polymer which is very largely insoluble in the polymerization medium is obtained, which is in the form of a gel.
• control example is to illustrate the importance of the mixed neodymium salt used in the preferred embodiment of the catalyst according to the invention.
• Example 2 The procedure of Example 1 is repeated except that 33.1 mg of the reaction solid obtained previously with tri (neodymium ethyl-2-hexanoate) is used and that polymerization is carried out for 175 minutes. 1.5 g of a polybutadiene with a high content of cis bonds are obtained, ie a much lower yield than with the mixed neodymium salt used in Example 4.
• the purpose of this example is to illustrate the importance of the variation in the molar ratios of each of the two carboxylic acids of different molecular weights used to prepare the mixed neodymium salt.
• Example 4 The procedure of Example 4 is repeated with the 3 catalyst solutions previously prepared except that the mass of catalyst used, the duration of the polymerization are those indicated in Table 2 which also shows the amount of polybutadiene obtained with these 3 solutions. catalytic and that of the control test carried out with tri (ethyl-2-hexanoate) of neodymium. TABLE 2 Essays mass of catalyst in mg Duration in minutes Amount of polybutadiene 1 31.3 25 4.9 g 2 20.7 20 6.8g 3 56.3 50 4 g T 33.1 175 1.5g
• This example illustrates an alternative embodiment of another mixed neodymium salt usable in the preferred embodiment of the catalyst according to the invention.
• Example 4 The procedure of Example 4 is repeated except that butyric acid is used in place of acetic acid and the following quantities of reagents are used: tri (ethyl-2-hexanoate) of neodymium in the form of a 0.35 molar solution of neodymium octanoate in toluene: 5 ml ethyl-2-hexanoic acid: 0.32 ml butyric acid: 0.3 ml.
• the catalyst obtained contains 6.3% by weight of neodymium.
• Example 1 The procedure of Example 1 is repeated except that 22 mg of the catalyst prepared above is used and that polymerization is carried out for 15 minutes. At the end of the polymerization reaction, 3.6 g of polybutadiene are obtained.
• This example illustrates an alternative embodiment of a catalyst according to the invention in which the metal is cerium.
• the procedure of example 4 is reproduced except that cerium is used in place of neodymium and that 9 ml of the mixed cerium salt obtained are used in a similar manner to the mixed salt of neodymium.
• the cerium tri (ethyl-2-hexanoate) solution used has a cerium concentration of 0.1 mole / liter and that of the two acetic and ethyl-2-hexanoic acids is also 0.1 mole / liter.
• the catalyst obtained contains 4.8% by weight of cerium.
• Example 1 The procedure of Example 1 is repeated except that 94.5 mg of the catalyst previously prepared is used and the polymerization is stopped after 20 minutes. 2.8 g of polybutadiene are obtained.
• This example illustrates a catalyst according to the invention in which the metal is uranium.
• example 4 the procedure of example 4 is reproduced except that uraniumm is used in place of neodymium and that 9.5 ml of the mixed uranium salt obtained is obtained in a similar manner to the mixed salt. of neodymium.
• the catalyst obtained contains 3.3% by weight of Uranium.
• Example 2 The procedure is repeated, from Example 1 except that 98.1 mg of the catalyst previously prepared is used in place of the mixed neodymium salt and that the polymerization is stopped after 55 minutes. 5 g of polybutadiene are obtained.

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• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
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• 1992
  • 1992-11-23 FR FR9214145A patent/FR2698290B1/fr not_active Expired - Fee Related
• 1993
  • 1993-11-02 ES ES93117703T patent/ES2104021T3/es not_active Expired - Lifetime
  • 1993-11-02 AT AT93117703T patent/ATE153678T1/de not_active IP Right Cessation
  • 1993-11-02 DE DE69311070T patent/DE69311070T2/de not_active Expired - Lifetime
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  • 1993-11-23 FI FI935199A patent/FI110100B/fi active
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• 1995
  • 1995-06-29 US US08/496,607 patent/US5612427A/en not_active Expired - Lifetime
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